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- Rivers--Oregon 142
- Dams 138
- Rivers--Washington (State) 115
- Waterfalls 73
- Rivers--Idaho 40
- Fishways 33
- Fish traps 30
- Fish weirs 26
- Salmon 23
- Rivers 16
- Chinook salmon 15
- Fishing boats 14
- Fish stocking 10
- Seining 10
- Forests and forestry 8
- Lakes 8
- Sawmills 8
- Bridges 7
- Canyons 6
- Rapids 6
